Area Forecast Discussion
Issued by NWS Atlanta, GA

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488
FXUS62 KFFC 182321
AFDFFC

Area Forecast Discussion
National Weather Service Peachtree City GA
721 PM EDT Fri Aug 18 2017



.PREV DISCUSSION... /Issued 345 PM EDT Fri Aug 18 2017/

SHORT TERM /Tonight through Saturday Night/...
Models in pretty good agreement through the long term. Weak surface
front will merge with the lee side trough and drift into
central/south Georgia. Drier air will spread across the CWA behind
the front ending the chance of precip across north Georgia late this
afternoon/evening. Weak high pressure will build into the Tennessee
Valley keeping the drier and more stable air across north Georgia
Saturday while proximity to the front will keep low pops across
central Georgia Saturday afternoon. With the drier air will come
slightly warmer daytime temps Saturday with most areas outside of
the mountains seeing low to mid 90s. Slightly lower dewpoints on
Saturday should keep Heat Index values at 100 or less across central
Georgia.

17

LONG TERM /Sunday through Friday/...
No changes made to the extended forecast. The upper level trough
continues to swing northeastward Sunday morning, which allows
zonal flow aloft through the day Sunday with upper level ridging
and surface high pressure to set up just east and northeast of the
forecast area. Extended models in good agreement stalling
weakened surface boundary over southeast portions of forecast area
Sunday evening through Monday.

A relatively benign pattern will set up for the beginning of the
week. However there will be enough moisture across the area the
diurnally driven showers and thunderstorms cannot be ruled out
each afternoon and evening. As the aforementioned surface boundary
will act as a focus for afternoon convection, the bulk of any
showers and thunderstorms are expected to remain south of the
path of the Solar Eclipse. Will continue slight to low chance POPS
through the week.

The upper ridging begins to break down on Tuesday and surface high
shifts off the Georgia coast as the next system sets up. Extended
models begin to diverge as impulses move through the flow north of
the forecast area. Weakening front again moves through portions of
Georgia Wednesday into Thursday.

Guidance temperatures showing near normal through the period and
will continue to take a blend.  Temperatures during the
eclipse (Monday) look to stay steady an hour before the maximum
obscurity (between 1pm-2pm), then drop a couple degrees up to 30
minutes after max obscurity (3pm). Temperatures are expected to
rebound quickly after the eclipse. The temperature drop will be
less for those under cloud cover/precipitation. This drop in
temperature is not expected to impact the high temperature Monday
afternoon.

Atwell/01

&&

.AVIATION...
00Z Update...
VFR through the period. Chances for precip remain too small to
mention at this time. Winds will remain on the west side for the
TAF period. Speeds overnight should be 6kt or less.

//ATL Confidence...00Z Update...
High confidence all elements.



&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          70  92  70  93 /  20  10  10  20
Atlanta         73  91  74  92 /  10  10  10  20
Blairsville     62  87  63  87 /   5  10   5  10
Cartersville    67  91  69  92 /   5  10   5  10
Columbus        75  94  74  95 /  10  20  10  20
Gainesville     70  89  71  91 /  10  10   5  10
Macon           71  94  70  94 /  20  10  10  20
Rome            67  93  70  93 /   5  10   5  10
Peachtree City  69  91  69  93 /  10  10  10  20
Vidalia         76  95  74  94 /  20  20  10  40

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$



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